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17 May 2024: Card library updated.

Hall of Gemstone

1GG · World Enchantment

At the beginning of each player's upkeep, that player chooses a color. Until end of turn, lands tapped for mana produce mana of the chosen color instead of any other color.

Similar cards

Color identity:
NameManaTypeText
Shifting Sky 2UEnchantment As Shifting Sky enters the battlefield, choose a color. All nonland permanents are the chosen color.
Tablet of the Guilds 2Artifact As Tablet of the Guilds enters the battlefield, choose two colors. Whenever you cast a spell, if it's at least one of the chosen colors, you gain 1 life for each of the chosen colors it is.
Iona, Shield of Emeria 6WWWLegendary Creature — Angel Flying As Iona, Shield of Emeria enters the battlefield, choose a color. Your opponents can't cast spells of the chosen color. 7/7
Harvest Mage GCreature — Human Spellshaper {G}, {T}, Discard a card: Until end of turn, if you tap a land for mana, it produces one mana of a color of your choice instead of any other type and amount. 1/1
Reverent Mantra 3WInstant You may exile a white card from your hand rather than pay this spell's mana cost. Choose a color. All creatures gain protection from the chosen color until end of turn.
Pentarch Paladin 2WWWCreature — Human Knight Flanking (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.) As Pentarch Paladin enters the battlefield, choose a color. {W}{W}, {T}: Destroy target permanent of the chosen color. 3/3
Edgewall Inn Land Edgewall Inn enters the battlefield tapped. As Edgewall Inn enters the battlefield, choose a color. {T}: Add one mana of the chosen color. {3}, {T}, Sacrifice Edgewall Inn: Return target card that has an Adventure from your graveyard to your hand.
Cho-Manno's Blessing WWEnchantment — Aura Flash Enchant creature As Cho-Manno's Blessing enters the battlefield, choose a color. Enchanted creature has protection from the chosen color. This effect doesn't remove Cho-Manno's Blessing.
Forsaken Crossroads Land Forsaken Crossroads enters the battlefield tapped. As Forsaken Crossroads enters the battlefield, choose a color. When Forsaken Crossroads enters the battlefield, scry 1. If you weren't the starting player, you may untap Forsaken Crossroads instead. {T}: Add one mana of the chosen color.
Shyft 4UCreature — Shapeshifter At the beginning of your upkeep, you may have Shyft become the color or colors of your choice. (This effect lasts indefinitely.) 4/2
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